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Most waterproofing in Pretoria is priced per m². A liquid membrane system runs about R180 to R350 per m² and torch-on about R250 to R450 per m², materials included. Stripping failed layers, fixing the screed or adding a reflective silver coat is extra, and small leak repairs usually carry a minimum call-out.

Both work, but Pretoria's intense summer sun ages any membrane quickly, so UV protection matters more than the system choice. A torch-on roof needs a silver or aluminium coat, and liquid systems should use a UV-stable top coat. Plan a recoat every few years.

Parapets are where most flat-roof leaks start, because the membrane changes direction and the wall cap often cracks. The fix is a proper upstand on the wall, a sealed or capped top and a correctly finished joint. Patching only the roof surface will not solve it.

On a flat roof in strong sun, usually yes. The reflective layer protects the membrane from UV, which is what makes bitumen go brittle, and it can noticeably cool the room below. It needs recoating every few years, so ask what the maintenance schedule looks like.